#638F18#638F18

#638F18 is a mid, vivid yellow-green. Relative luminance 0.224; OKLCH L 59.6% C 0.149 H 128.9°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#638F18
RGB	rgb(99, 143, 24)
HSL	hsl(82, 71%, 33%)
HSV	hsv(82, 83%, 56%)
CMYK	cmyk(30.8%, 0%, 83.2%, 43.9%)
CIE-LAB	lab(54.41, -32.49, 52.85)
CIE-LCH	lch(54.41, 62.04, 121.58°)
OKLab	oklab(59.61% -0.0933 0.1157)
OKLCH	oklch(59.61% 0.149 128.9)
XYZ	xyz(15.1329, 22.3631, 4.3832)
Luminance	0.2236 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638F18 #44188F

analogous

#8F7F18 #638F18 #278F18

triadic

#638F18 #18638F #8F1863

tetradic

#638F18 #188F7F #44188F #8F1827

square

#638F18 #188F7F #44188F #8F1827

split-complementary

#638F18 #18278F #7F188F

monochromatic

#1A2606 #3F5B0F #638F18 #87C321 #A5DF42

Accessibility & contrast

On white

3.84

#638F18 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#638F18 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638F18

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638F18	#FFFFFF	#000000	##000000
##638F18	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#968400

Deuteranopia (green-blind)

#908126

Tritanopia (blue-blind)

#66887A

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #638f18;
/* rgb */ color: rgb(99, 143, 24);
/* oklch */ color: oklch(59.6% 0.149 128.9);

Tailwind

colors: {
  custom: {
    50: '#94b061',
    500: '#638f18',
    950: '#000000',
  },
}

SCSS

$custom: #638f18;
$custom-light: #94b061;
$custom-dark: #000000;

JSON

{
  "hex": "#638f18",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 24
  },
  "hsl": {
    "h": 82.185,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.59605,
    "c": 0.14866,
    "h": 128.9
  },
  "luminance": 0.22364
}

Semantic roles & 50–950 ramp

primary

#638F18

secondary

#7143C0

accent

#3AEE7C

background

#F9FAF6

surface

#F2F4EB

border

#CCCEC6

text

#0E1005

muted

#7E7F7A

Preview Lab

Preview with #638F18

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →